US7056243B2 - Plastic movable guide for transmission device - Google Patents

Plastic movable guide for transmission device Download PDF

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Publication number
US7056243B2
US7056243B2 US10/281,758 US28175802A US7056243B2 US 7056243 B2 US7056243 B2 US 7056243B2 US 28175802 A US28175802 A US 28175802A US 7056243 B2 US7056243 B2 US 7056243B2
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United States
Prior art keywords
plunger
reinforcing plate
receiving portion
plate
guide
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Expired - Lifetime, expires
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US10/281,758
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English (en)
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US20030092521A1 (en
Inventor
Masahiko Konno
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Tsubakimoto Chain Co
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Tsubakimoto Chain Co
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Publication date
Application filed by Tsubakimoto Chain Co filed Critical Tsubakimoto Chain Co
Assigned to TSUBAKIMOTO CHAIN CO. reassignment TSUBAKIMOTO CHAIN CO. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KONNO, MASAHIKO
Publication of US20030092521A1 publication Critical patent/US20030092521A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/18—Means for guiding or supporting belts, ropes, or chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0863—Finally actuated members, e.g. constructional details thereof
    • F16H2007/0872—Sliding members

Definitions

  • This invention relates to a plastic movable guide for a flexible power transmission medium, such as chain which transmits power between sprockets, or a belt which transmits power between pulleys. It relates particularly to improvements in a mechanism in which the guide is pivoted on a mounting shaft and held in sliding engagement with the power transmission medium by the plunger of a tensioner lever.
  • An engine generally includes a transmission device, which transmits power from the crankshaft to one or more camshafts by means of a chain, a belt or the like, as shown in FIG. 15 .
  • Similar power transmission devices are also used in other machines, especially where a driven shaft is to be rotated by a driving shaft which is parallel to, but spaced some distance from, the driven shaft.
  • a movable guide Ga in sliding contact with a circulating power transmission medium, which in this case is an endless CH, cooperates with a tensioner T to maintain appropriate tension in the chain, and also prevents vibration in the plane of travel of the chain as well as transverse vibrations.
  • the movable guide Ga is attached to a frame E of the engine on a supporting shaft P, which may be a mounting bolt, a pin or the like.
  • a driving sprocket S 1 which may be a crankshaft sprocket, operates driven sprockets S 2 , which may be camshaft sprockets, through the chain CH.
  • a fixed guide Gb is also provided for limiting and guiding the travel of the circulating chain CH.
  • FIG. 10 is a side elevational view a plastic movable guide 300 , used as a tensioner lever in a chain transmission, which the present inventor previously described in Japanese Patent Application No. 2000-382798, and FIG. 11 is a bottom plan view of the plastic movable guide.
  • a guide body 301 includes a shoe 302 , with the surface of which a traveling chain CH is sliding contact.
  • the guide body also includes a plate-receiving portion 303 extending along the back of the shoe 302 along the longitudinal direction of the guide.
  • the shoe and plate-receiving portion are integrally molded as a unit from a synthetic resin.
  • a plate 308 composed of a rigid material, typically metal, reinforces the guide body 301 , fits into a slot 307 in the plate receiving portion. This slot extends along the longitudinal direction of the guide and has its opening facing in a direction opposite to the direction in which the chain-engaging surface of the shoe faces.
  • Amounting hole 305 for mounting the guide on the frame of an engine or other machine, is provided in the plate-receiving portion near one end of the guide.
  • a through hole 308 A is provided in the reinforcing plate 308 near one end thereof.
  • the guide body 301 itself incorporates a shoe on which the chain slides, it is not necessary to provide a separate shoe member.
  • the integrally molded construction reduces the number of parts required for the guide, and also reduces the number of required production steps.
  • the reinforcing plate 308 increases the strength, toughness and bending rigidity of the guide in the pivoting direction.
  • the relationships between the respective sizes and shapes of the guide body 301 and the reinforcing plate 308 are not particularly considered, and the mounting hole 305 was designed so that its diameter was the same as that of the through hole 308 A.
  • variations in accuracy in production, and the differences between coefficients of thermal expansion of materials either caused the reinforcing plate 308 to protrude slightly from the slot, or to retract into the slot by causing the reinforcing plate 308 to become slightly smaller than the guide body 301 .
  • Various phenomena occur as a result of these variations.
  • the inventor has studied and analyzed the causes of noise and deterioration in plastic movable guides, and has found that the above-described problems are not generated in the same manner in all plastic movable guides.
  • the level of metallic noise that occurs is higher than in the usual case, where the reinforcing plate is in flush relationship with the opening of the slot.
  • the inventor also found that the other edge of the reinforcing plate 308 hit the bottom of the slot, i.e., the back surface of the shoe, as shown in FIG. 12( a ), as the plate moved back and forth in the slot 307 .
  • the repeated engagement of the edge of the plate 308 with the back of the shoe resulted in cracks in the synthetic resin and caused deterioration of the shoe.
  • the profile of the plunger-receiving portion 301 B of the plastic movable guide 300 is a straight line.
  • the contact angle between the front end of the plunger and the plunger-receiving portion changes in use as the plunger projects and the guide rotates about its pivot axis.
  • the contact area between the front end of the plunger and the plunger-receiving portion decreases, and load is concentrated at one portion of the plunger-receiving portion.
  • the inventor has found that the concentration of the load was a cause of accelerated wear in the plunger-receiving portion of the guide.
  • the objects of this invention are to solve the above-mentioned problems encountered in the use of prior plastic movable guides, and to provide a plastic movable guide having superior quietness of operation, reduced production cost, and comparatively little wear of the reinforcing plate over a long period of time.
  • a preferred plastic movable guide in accordance with the invention comprises a guide body including an elongated shoe having front and back sides facing in opposite directions, a surface on the front side of the shoe for sliding engagement with a traveling, flexible, power transmission medium, and a plate-receiving portion extending longitudinally along the back side of the shoe.
  • the shoe and plate-receiving portion are integrally molded as a unit from a synthetic resin.
  • the plate-receiving portion has a slot with an opening facing in a direction opposite to the direction in which said front side faces.
  • the guide body has a mounting hole, adjacent to an end of the plate-receiving portion, for mounting the guide on a frame of a machine, and the reinforcing plate similarly has a through hole adjacent one of its ends.
  • the mounting hole and the through hole are in register with each other so that a mounting shaft on which the guide is pivoted can extend through both holes.
  • the guide body has a plunger-receiving portion at a location remote from the holes. The slot extends at least into the plunger-receiving portion.
  • the reinforcing plate protrudes from the slot at the location of the plunger-receiving portion to expose at least a portion of an edge of the reinforcing plate, whereby a plunger of a tensioner may press directly against that portion of the edge of the reinforcing plate at that location.
  • the protruding portion of the edge of the reinforcing plate has a curvature such that the area of contact between the reinforcing plate and an end surface of a plunger in the plunger is substantially constant irrespective of the contact angle between the reinforcing plate and the plunger.
  • the curved portion of the edge of the reinforcing plate is preferably in the form of a convex or concave circular arc, depending on the shape of the end of the plunger with which it is in engagement.
  • the transverse cross-sectional shape of the plunger-engaged edge of the reinforcing plate is preferably a substantially circular arc, a beveled rectangle, or a rectangle having rounded corners.
  • the particular plastic material forming the guide body is not especially limited. However, since a surface suitable for sliding surface with a chain, a belt or the like is required so that the shoe portion of the guide functions properly, the material is preferably a so-called engineering plastic, such as a polyamide type resin, having superior wear resistance and lubricating properties. It is possible to utilize a fiber-reinforced resin solely, or to use a fiber-reinforced resin concurrently with another resin.
  • the material of the reinforcing plate is likewise not especially limited, but, since the reinforcing plate must have the bending rigidity and strength required for the plastic movable guide, iron based metals such as cast iron, stainless steel and the like, nonferrous metals such as aluminum, magnesium, titanium and the like, engineering plastics such as polyamide type resin and the like, and fiber reinforced plastics, are preferably used.
  • the reinforcing plate protrudes slightly from the slot, the reinforcing plate can remain in contact with the plunger during forward and backward movement of the plunger. Repeated contact between the reinforcing plate and the front end of the plunger at a high relative speed, due to back and forth motion of the reinforcing plate in the guide body, does not occur, and the generation of metallic noise is suppressed.
  • the profile of the reinforcing plate is formed so that the reinforcing plate and end of the plunger maintain a substantially constant contact area irrespective of the angle between the plunger and the guide. Even if the angle varies as a result of elongation of the chain or other power transmission medium, a fixed contact area is maintained between the reinforcing plate and the front end surface of the plunger. Accordingly, no concentration of contact pressure occurs, and deterioration of the reinforcing plate due to wear is suppressed.
  • the profile of the reinforcing plate at the location of the plunger-receiving portion can made be in the form of a convex or concave circular arc, without special machining processes, and with the profile in either of these forms, the contact area between the reinforcing plate and the end of the plunger can be maintained at a fixed value.
  • the transverse cross-section of the plunger-contacting portion of the reinforcing plate is in the form of a substantially circular arc, or has beveled or rounded corners, even if vibration of the guide or the plunger of the tensioner causes the guide and plunger to become inclined relative to each other, concentration of load on a corner of the reinforcing plate is avoided, thereby reducing wear of the reinforcing plate and extending its useful life.
  • FIG. 1 is an exploded side elevational view of a movable guide in accordance with a first embodiment of the invention
  • FIG. 2 is a bottom plan view of the guide of FIG. 1 ;
  • FIG. 3 is an exploded cross-sectional view taken on surface III—III in FIG. 1 ;
  • FIG. 4 is a cross-sectional view taken on plane IV—IV in FIG. 1 ;
  • FIG. 5 is a cross-sectional view taken on surface V—V in FIG. 1 , showing a plunger being brought into contact with a plunger-receiving portion on a pivoting front end of the guide;
  • FIG. 6 is a side elevational view showing a reinforcing plate in accordance with a second embodiment of the invention in contact with the plunger of a tensioner;
  • FIG. 7 is a side elevational view of the reinforcing plate shown in FIG. 6 showing the reinforcing plate and plunger engaged with each other at a different contact angle;
  • FIG. 8( a ) is a side elevational view showing another embodiment of the reinforcing plate in contact with a plunger
  • FIG. 8( b ) is a side elevational view showing the reinforcing plate of FIG. 8( a ) in contact with the plunger at a different contact angle;
  • FIGS. 9( a ), 9 ( c ) and 9 ( e ) are transverse cross-sectional views, each showing a different embodiment of the plunger-receiving portion of a guide in accordance with the invention, in contact with a plunger of a tensioner;
  • FIGS. 9( b ), 9 ( d ) and 9 ( f ) show the guides of FIGS. 9( a ), 9 ( c ) and 9 ( e ), respectively in a tilted relationship with the plunger.
  • FIG. 10 is an exploded elevational view of a conventional movable guide
  • FIG. 11 is a bottom plan view of the conventional movable guide of FIG. 10 ;
  • FIGS. 12( a ) and 12 ( b ) are transverse cross-sectional views of the plunger-receiving portion of the conventional movable guide, illustrating a problem encountered in the operation of the conventional guide;
  • FIGS. 13( a ) and 13 ( b ) are side elevational views of the plunger-engaging portion of a reinforcing plate, illustrating another problem of the conventional movable guide.
  • FIGS. 14( a ) and 14 ( b ) are transverse cross-sectional views of the plunger-receiving portion of a movable guide, illustrating another problem, which is overcome by the embodiment illustrated in FIGS. 9( a ) and 9 ( b ); and
  • FIG. 15 is an schematic view showing the timing transmission of an internal combustion engine, illustrating how a movable guide is used to guide a timing chain.
  • the movable guide 100 shown in FIG. 1 is formed by incorporating a reinforcing plate 108 into a guide body 101 in a direction of the arrow.
  • This guide body 101 is a plastic body integrally molded as a unit from synthetic resin.
  • the guide body comprises a shoe 102 , having on one side a sliding surface on which a traveling chain slides, and, on its opposite side, a plate-receiving portion 103 , which is elongated along the longitudinal direction of the guide.
  • the plate-receiving portion extends from the shoe in a direction opposite to the direction in which the sliding surface faces.
  • the guide body 100 includes a flange 104 formed at an edge of the plate-receiving portion 103 , and a boss 106 having a mounting hole 105 for pivotally mounting the guide on the frame of an engine, or other machine having a drive using a chain, belt, or similar flexible power transmission medium.
  • the plate-receiving portion 103 has a truss-shaped array of reinforcing ribs 103 ′′, and a slot 107 in the flange 104 , the slot being open in a direction opposite to the direction in which the sliding surface of the shoe faces, as can be seen from FIGS. 3 to 5 .
  • a reinforcing plate 108 having a mounting hole for receiving a bolt or the like, is fitted into the slot 107 .
  • a plunger-receiving portion 101 B is formed near the pivoting front end of the guide body 101 .
  • the reinforcing plate 108 protrudes slightly from the slot opening at this location, and plunger 110 of a tensioner presses against the protruding portion of the reinforcing plate. Because the reinforcing plate 108 protrudes slightly from the slot, when the plunger contacts the reinforcing plate, the reinforcing plate does not move back and forth in the guide body, and the forward and backward movement of the plunger can be transmitted reliably to the guide at the location of the plunger-receiving portion 10 B. Referring to FIG.
  • the ratio (h/w), of the height h of the protruded portion to the width of the slot 107 be less than 1.
  • the reinforcing plate 108 has a width w of 3 mm, and a height h of 0.5 mm.
  • the ratio h/w is 0.17.
  • the shape of the plunger-receiving portion is not especially limited. However, to prevent dislodging of the front end of the plunger from the plunger-receiving portion 101 B by transverse vibration of the lever, it is desirable to form protruded portions 104 A at the edges of the flange 104 , as shown in FIG. 5 , to prevent transverse shifting of the lever.
  • the reinforcing plate 108 protrudes from the slot opening only at the plunger-receiving portion 101 B, the plate may protrude from the slot opening along the entire length of the guide.
  • a plastic movable guide with a reinforcing plate 108 fitted into it is attached to the frame of an engine or other machine by a shoulder bolt 109 , having a pivot portion 109 A as shown in FIG. 3 , or a mounting pin provided on the frame in such a manner that the mounting bolt or pin penetrated through the guide body 101 and the reinforcing plate 108 .
  • the guide body 101 and the reinforcing plate 108 have different coefficients of thermal expansion, they are secured together only at the location of their mounting holes, which are near one end of the guide.
  • the reinforcing plate and the guide body are otherwise relatively movable in the longitudinal direction, and accordingly, no deformation of the guide body or breakage of its plate-receiving portion occur due to thermal expansion or contraction.
  • a reinforcing plate 208 which is fitted into a plastic guide body (not shown), has a protruding portion the profile of which is in the form of a convex, circular arc.
  • the protruding portion is brought into contact with the front end of the plunger 210 of a tensioner (not shown).
  • FIG. 6 shows the normal contact between the reinforcing plate 208 and the plunger 210
  • FIG. 7 shows the contact between the reinforcing plate 208 and the plunger 210 when plunger has extended from the tensioner as a result of elongation of the chain in which tension is maintained.
  • the profile of the plunger-contacting part of the reinforcing plate is a convex arc, the same effect can be achieved when the profile is a concave, circular arc, provided that the end of the plunger has a convex shape.
  • the front end of the plunger 210 has a convex, spherical shape
  • the profile of the plunger-contacting part of the reinforcing plate 208 is a concave circular arc, having a greater radius of curvature than that of the spherical end of the plunger.
  • the reinforcing plate 208 protrudes slightly from a slot in a guide body 201 having a chain-contacting sliding surface 202 .
  • the plunger-contacting edge of the reinforcing plate 208 which contacts the end of plunger 210 , is in the form of a substantially circular arc in transverse cross-section. Even if the guide and the plunger 210 are laterally relative to each other in the lateral direction, as depicted in FIG. 9( b ), the front end of the plunger does not contact a corner of the plate. Instead, it contacts the rounded edge, and a fixed contact area is maintained.
  • FIGS. 9( a ) and 9 ( b ) the reinforcing plate 208 protrudes slightly from a slot in a guide body 201 having a chain-contacting sliding surface 202 .
  • the plunger-contacting edge of the reinforcing plate 208 which contacts the end of plunger 210 , is in the form of a substantially circular arc in transverse cross-section. Even
  • the plunger-contacting edge of the reinforcing plate can have beveled corners, as in plate 208 ′, or rounded corners, as in plate 208 ′′.
  • the reinforcing plate protrudes slightly from the slot opening, the plate reliably remains in contact with the end of the plunger as the plunger moves back and forth.
  • the reinforcing plate does not move relative to the guide body into and out of the slot, and accordingly metallic noise is suppressed, and the overall noise of the engine is reduced.
  • the guide body and reinforcing plate are mounted on a bolt or mounting pin extending through holes adjacent one end of the guide, even if they have different coefficients of thermal expansion, they are free to expand and contract longitudinally relative to each other, and accordingly thermal deformation of the guide and breakage of the plate-receiving portion are avoided.
  • the profile of the reinforcing plate is formed so that it contacts the end surface of the plunger over a fixed contact area irrespective of the contact angle between the plunger-receiving portion and the plunger, if the contact angle changes as the chain or other transmission medium elongates, the fixed contact area is maintained, concentration of contact pressure is avoided, and deterioration of the plunger-contacting edge of the reinforcing plate due to wear is reduced.
  • the contact area between the reinforcing plate and the front end of the plunger can be maintained at a fixed value, but the profile is very simple and can be produced without special working.
  • the transverse cross-section of the plunger-contacting edge of the reinforcing plate is a substantially circular arc, or has beveled or rounded corners, even if vibration causes the guide and plunger to be inclined relative to each other, concentration of load at a corner of the edge of the reinforcing plate is avoided, and wear of the reinforcing plate can be suppressed for a long period of time.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
US10/281,758 2001-11-14 2002-10-28 Plastic movable guide for transmission device Expired - Lifetime US7056243B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001349133A JP3336337B1 (ja) 2001-11-14 2001-11-14 伝動装置用プラスチック製可動ガイド
JP349133/2001 2001-11-14

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US20030092521A1 US20030092521A1 (en) 2003-05-15
US7056243B2 true US7056243B2 (en) 2006-06-06

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US (1) US7056243B2 (de)
EP (1) EP1312830B1 (de)
JP (1) JP3336337B1 (de)
CN (1) CN1272561C (de)
DE (1) DE60202513T2 (de)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
US20110306449A1 (en) * 2009-02-27 2011-12-15 Borgwarner Inc. Automotive timing chain system component and method thereof
US20160290446A1 (en) * 2013-11-25 2016-10-06 Schaeffler Technologies AG & Co., KG Tensioning rail, and traction mechanism drive including such a tensioning rail

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JP3359340B1 (ja) * 2002-01-23 2002-12-24 株式会社椿本チエイン 伝動装置用可動ガイド
JP2005048931A (ja) * 2003-07-31 2005-02-24 Tsubakimoto Chain Co 伝動装置用レバー
EP1746306A1 (de) * 2005-07-20 2007-01-24 DSM IP Assets B.V. Gleitschiene für ein Getriebe
DE202006008573U1 (de) * 2006-05-30 2007-10-11 JOH. WINKLHOFER & SÖHNE GMBH & Co. KG Spannschiene mit Kanaleinrichtung in Druckkörper
WO2010090139A1 (ja) * 2009-02-03 2010-08-12 Ntn株式会社 チェーンガイドおよびチェーンテンショナ装置
US9429216B2 (en) * 2011-02-23 2016-08-30 Ntn Corporation Chain guide and chain tensioner device
CN103620265A (zh) * 2011-06-13 2014-03-05 Ntn株式会社 链条引导件和链条传动装置
JP5706261B2 (ja) * 2011-07-25 2015-04-22 Ntn株式会社 カム軸駆動用のチェーン伝動装置
CN104169610B (zh) * 2012-03-12 2018-01-02 Ntn株式会社 链引导件以及链传动装置
WO2013176248A1 (ja) * 2012-05-24 2013-11-28 Ntn株式会社 チェーンガイドおよびチェーン伝動装置
JP2015059577A (ja) * 2013-09-17 2015-03-30 Ntn株式会社 チェーン伝動装置
JP6278673B2 (ja) * 2013-11-28 2018-02-14 Ntn株式会社 チェーンガイドおよびチェーン伝動装置
JP6205291B2 (ja) * 2014-02-17 2017-09-27 Ntn株式会社 カム軸駆動用チェーン伝動装置
JP6324359B2 (ja) * 2015-10-21 2018-05-16 株式会社椿本チエイン チェーンガイド
FR3067782B1 (fr) 2017-06-15 2019-07-12 Peugeot Citroen Automobiles Sa Procede d’assemblage de guides de chaine de distribution de moteur et systeme de guidage d’une chaine de distribution

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GB2351136A (en) 1999-06-15 2000-12-20 Tsubakimoto Chain Co Tensioner lever
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JP3253951B1 (ja) 2000-12-15 2002-02-04 株式会社椿本チエイン 伝動装置用プラスチック製可動ガイド
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US4832664A (en) * 1987-02-26 1989-05-23 Dr. Ing. H.C.F. Porsche Ag Guide rail for drive chains
US4826468A (en) * 1987-11-18 1989-05-02 Klifa Fahrzeugteile Gmbh & Co. Chain tensioner
US5184982A (en) * 1991-04-11 1993-02-09 Tsubakimoto Chain Co. Tensioner device for chains and the like
US5318482A (en) * 1991-11-07 1994-06-07 Tsubakimoto Chain Co. Chain guide having improved arm-shoe attachment feature
DE19523912A1 (de) 1995-06-30 1997-03-27 Bosch Gmbh Robert Führungsschiene, insbesondere Spannschiene für einen Nockenwellenantrieb einer Brennkraftmaschine
JPH10311395A (ja) 1997-05-12 1998-11-24 Tsubakimoto Chain Co 伝動チェーン走行案内装置のチェーン摺接シュー部材 取付け装置
US6062998A (en) * 1997-07-28 2000-05-16 Tsubakimoto Chain Co. Shoe for guiding the running of a transmission chain
JP2000097300A (ja) * 1998-09-24 2000-04-04 Borg Warner Automotive Kk チェーンテンショナアームおよびチェーンガイド
GB2347174A (en) * 1999-02-23 2000-08-30 Rover Group Pre-assembled flexible drive assembly, eg for i.c. engine camshafts
GB2351136A (en) 1999-06-15 2000-12-20 Tsubakimoto Chain Co Tensioner lever
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JP3253951B1 (ja) 2000-12-15 2002-02-04 株式会社椿本チエイン 伝動装置用プラスチック製可動ガイド
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110306449A1 (en) * 2009-02-27 2011-12-15 Borgwarner Inc. Automotive timing chain system component and method thereof
US8992358B2 (en) * 2009-02-27 2015-03-31 Borgwarner Inc. Automotive timing chain system component and method thereof
US20160290446A1 (en) * 2013-11-25 2016-10-06 Schaeffler Technologies AG & Co., KG Tensioning rail, and traction mechanism drive including such a tensioning rail
US9759292B2 (en) * 2013-11-25 2017-09-12 Schaeffler Technologies AG & Co. KG Tensioning rail, and traction mechanism drive including such a tensioning rail

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Publication number Publication date
JP2003148567A (ja) 2003-05-21
CN1419063A (zh) 2003-05-21
EP1312830A1 (de) 2003-05-21
DE60202513T2 (de) 2005-12-22
DE60202513D1 (de) 2005-02-10
US20030092521A1 (en) 2003-05-15
EP1312830B1 (de) 2005-01-05
JP3336337B1 (ja) 2002-10-21
CN1272561C (zh) 2006-08-30

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